Hi,
Is your lady on Beta blockers? GTN spray?
I have a client with Angina on both of these ( amoung other medications) and I have been treating her over a long period of time on and off, All has been well throughout. I think in these cases theres always conflicting information, I guess you just have to trust your own judgement, if you feel comfortable to treat her.
I know my client has been better as a result of having Reflexology and Reiki.
love,light & always healing,
Lisa x